Quick-change connector for pipeline

Abstract

The utility model relates to the technical field of industrial joints, and discloses a quick-change joint for a pipeline, which comprises a male joint and a female joint, wherein an ejector rod is arranged in the male joint; the female connector is provided with a valve element, a pressure relief piece is arranged on the valve element, at least part of the pressure relief piece protrudes out of the valve element without external force, the pressure relief piece moves towards the interior of the valve element under the external force, and in the butt joint process of the male connector and the female connector, the ejector rod abuts against the pressure relief piece firstly so that the male connector can be communicated with the female connector. According to the quick-change connector for the pipeline, the pressure relief piece is arranged on the valve element, the force needed by the ejector rod to push the pressure relief piece to move towards the interior of the valve element is small, the pressure relief piece moves towards the interior of the valve element, and a small amount of liquid flows into the male connector from the female connector, so that the pressure intensity in the female connector is reduced, and the safety of the pipeline is improved. And then the ejector rod is in contact with the surface of the valve element, and the valve element can be pushed to move towards a pipeline connected with the female connector with small acting force.

Description

Technical Field

[0001] This utility model relates to the field of industrial connector technology, and in particular to a quick-connect connector for pipelines. Background Technology

[0002] Quick-connect couplings, including hydraulic quick-connect couplings and various fluid quick-connect couplings, are devices that allow for rapid connection or disconnection of pipelines. Existing quick-connect couplings consist of a male and a female connector. The male connector contains a push rod, and the female connector contains a valve core. During the connection process, the push rod pushes the valve core, allowing fluid from the female connector to flow into the male connector. Because the pipeline connected to the female connector is filled with fluid, the fluid generates significant pressure on the valve core. Therefore, a considerable force is required to move the valve core towards the pipeline during connection, thus completing the connection between the male and female connectors.

[0003] Therefore, there is an urgent need for a quick-connect fitting for pipelines to solve the above-mentioned technical problems. Utility Model Content

[0004] The purpose of this invention is to propose a quick-connect fitting for pipelines that can solve the problem that when the pipeline connected to the female fitting is filled with liquid, the liquid exerts a large pressure on the valve core, requiring a large force to move the valve core towards the pipeline when the male fitting is connected to the female fitting.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A quick-connect fitting for pipelines, comprising:

[0007] A male connector, wherein a push rod is provided inside the male connector, and the push rod is movable along the length direction of the male connector;

[0008] The female connector is equipped with a valve core, and the valve core is equipped with a pressure relief component. The cross-sectional area of ​​the push rod is not less than the cross-sectional area of ​​the pressure relief component, and the cross-sectional area of ​​the pressure relief component is less than the cross-sectional area of ​​the valve core. Under no external force, at least part of the pressure relief component protrudes from the valve core. Under external force, the pressure relief component moves towards the interior of the valve core. During the docking process between the male connector and the female connector, the push rod first abuts against the pressure relief component to connect the male connector and the female connector.

[0009] As an alternative, the valve core includes a first sealing portion, a first elastic element, and an elastic element mounting portion connected to the first sealing portion. The first sealing portion and the elastic element mounting portion form a receiving cavity. The pressure relief member is disposed in the receiving cavity. The first sealing portion has an opening communicating with the receiving cavity. The pressure relief member extends at least partially beyond the opening. The pressure relief member can move towards the interior of the receiving cavity under the action of the push rod.

[0010] As an alternative, the first sealing part is provided with a pressure relief channel, and the pressure relief component is provided with a pressure relief port. Under the action of external force, the pressure relief channel is connected to the pressure relief port.

[0011] As an optional solution, the pressure relief component includes a pressure relief part and a second sealing part connected to the pressure relief part. The pressure relief part is conical, and the second sealing part is cylindrical. The interior of the pressure relief part and the interior of the second sealing part are both hollow structures. The pressure relief port is disposed on the pressure relief part and is connected to the interior of the pressure relief part.

[0012] As an alternative, the outer diameter of the second sealing part near the pressure relief part is equal to the outer diameter of the bottom of the pressure relief part, the outer diameter of the second sealing part away from the pressure relief part is smaller than the outer diameter of the bottom of the pressure relief part, and a second elastic element is sleeved on the end of the second sealing part away from the pressure relief part.

[0013] As an optional solution, the pressure relief component includes a force-receiving part connected to the pressure relief part. The force-receiving part and the second sealing part are respectively disposed on two opposite sides of the pressure relief part. The force-receiving part extends out of the opening. During the docking process between the male connector and the female connector, the push rod first abuts against the force-receiving part.

[0014] As an alternative, the pressure relief component includes a pressure relief ball and a third spring disposed inside the receiving cavity. The pressure relief ball is adjacent to the opening, and at least a portion of the pressure relief ball protrudes from the opening when no external force is applied. The third spring is disposed on the side of the pressure relief ball opposite to the opening.

[0015] As an alternative, the first sealing part is conical, the elastic element mounting part is cylindrical, the opening is located at the top of the cone, the elastic element mounting part is connected to the bottom of the cone, the outer diameter of the elastic element mounting part is smaller than the outer diameter of the bottom of the cone, and the first elastic element is sleeved on the elastic element mounting part.

[0016] As an alternative, the male connector is provided with a second fixing member, the diameter of the end of the push rod adjacent to the female connector is larger than the diameter of the end of the push rod away from the female connector, and the end of the push rod away from the female connector is provided with a fourth elastic member, the fourth elastic member being confined between the second fixing member and the push rod.

[0017] This utility model has at least the following beneficial effects: In this application, the valve core is provided with a pressure relief component. The cross-sectional area of ​​the pressure relief component is smaller than that of the valve core. The force required for the push rod to push the pressure relief component to move inward toward the valve core is smaller. As the pressure relief component moves inward toward the valve core, a small amount of liquid flows from the female connector to the male connector, thereby reducing the pressure inside the female connector. Then, the push rod contacts the surface of the valve core, and a small force is needed to push the valve core to move toward the pipe connected to the female connector, thus completing the docking of the female connector and the male connector. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below.

[0019] Figure 1 A schematic diagram of a quick-connect fitting for a pipeline provided in an embodiment of this utility model;

[0020] Figure 2 A schematic diagram of the valve core provided in an embodiment of this utility model;

[0021] Figure 3 A schematic diagram of the structure of the pressure relief component provided in this embodiment of the utility model;

[0022] Figure 4 First sectional view of the female connector provided in this embodiment of the utility model;

[0023] Figure 5 A second sectional view of the female connector provided in this embodiment of the utility model;

[0024] Figure 6 A cross-sectional view of a quick-connect fitting for a pipeline (during the docking process) provided for an embodiment of this utility model;

[0025] Figure 7 This is a schematic diagram of the valve core structure provided in another embodiment of the present invention;

[0026] Figure 8 A view of a female connector provided in another embodiment of this utility model;

[0027] Figure 9 A cross-sectional view of a quick-connect fitting for a pipeline (during the docking process) provided for another embodiment of this utility model.

[0028] Figure label:

[0029] 1. Female connector; 11. Valve core; 111. First sealing part; 1111. Pressure relief flow channel; 112. Elastic element mounting part; 113. First elastic element; 12. Pressure relief part; 121. Pressure relief part; 1211. Pressure relief port; 122. Second sealing part; 123. Force-bearing part; 124. Second elastic element; 125. Third spring; 126. Pressure relief ball; 13. First fixing part; 2. Male connector; 21. Push rod; 22. Second fixing part; 23. Fourth elastic element. Detailed Implementation

[0030] In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0031] In the prior art, quick-connect couplings include a male coupling and a female coupling. The male coupling has a push rod inside, and the female coupling has a valve core. During the docking process of the male and female couplings, the push rod pushes the valve core to move, so that the liquid at the female coupling flows into the male coupling. Since the pipeline connected to the female coupling is full of liquid, the liquid generates a large pressure on the valve core. Therefore, when the male and female couplings are docked, a large force is required to push the valve core towards the pipeline, thereby completing the docking of the male and female couplings.

[0032] Therefore, such as Figures 1 to 9 As shown, an embodiment of this utility model provides a quick-connect fitting for pipelines to solve the above-mentioned technical problems.

[0033] Specifically, a quick-connect fitting for pipelines includes a male fitting 2 and a female fitting 1. The male fitting 2 is provided with a push rod 21, which can move along the length of the male fitting 2. The female fitting 1 includes a housing and a valve core 11 disposed inside the housing. Both the female fitting 1 and the male fitting 2 are connected to pipelines. Under no external force, the valve core 11 is used to prevent liquid from flowing out of the female fitting 1. The valve core 11 is provided with a pressure relief component 12. The cross-sectional area of ​​the push rod 21 is not less than the cross-sectional area of ​​the pressure relief component 12, and the cross-sectional area of ​​the pressure relief component 12 is less than the cross-sectional area of ​​the valve core 11. Under no external force, at least part of the pressure relief component 12 protrudes from the valve core 11. Under external force, the pressure relief component 12 moves inward toward the valve core 11. During the docking process between the male fitting 2 and the female fitting 1, the push rod 21 first abuts against the pressure relief component 12 to connect the male fitting 2 and the female fitting 1. Since the cross-sectional area of ​​the pressure relief component 12 is smaller than that of the valve core 11, the force required for the push rod 21 to push the pressure relief component 12 toward the inside of the valve core 11 is smaller. As the pressure relief component 12 moves toward the inside of the valve core 11, a small amount of liquid flows from the female connector 1 into the male connector 2, thereby reducing the pressure inside the female connector 1. Then, the push rod 21 contacts the surface of the valve core 11 and can push the valve core 11 toward the pipe connected to the female connector with a small force, thus completing the docking of the female connector 1 and the male connector 2.

[0034] In some embodiments, such as Figure 2 , Figure 5 As shown, in order to facilitate the installation of a pressure relief component 12 on the valve core 11, the valve core 11 includes a first sealing part 111, a first elastic element 113, and an elastic element mounting part 112 connected to the first sealing part 111. The first sealing part 111 is used to seal the gap between the valve core 11 and the housing of the female connector 1, thereby preventing liquid from flowing out of the female connector 1. The first sealing part 111 and the elastic element mounting part 112 form a receiving cavity. The pressure relief component 12 is disposed in the receiving cavity. The first sealing part 111 has an opening that communicates with the receiving cavity. The pressure relief component 12 extends at least partially out of the opening. The pressure relief component 12 can move inward toward the inside of the receiving cavity under the action of the push rod 21, thereby allowing a small amount of liquid inside the female connector 1 to flow into the male connector 2, reducing the pressure inside the female connector 1.

[0035] In some embodiments, such as Figure 4 , Figure 6 As shown, in order to allow the liquid inside the female connector 1 to flow into the male connector 2 under the action of the pressure relief member 12 and the push rod 21, the first sealing part 111 is provided with a pressure relief channel 1111, and the pressure relief member 12 is provided with a pressure relief port 1211. Under the action of external force, the pressure relief channel 1111 and the pressure relief port 1211 are connected, and the liquid inside the female connector 1 flows into the male connector 2 through the pressure relief port 121 and the pressure relief channel 1111 in sequence.

[0036] In some embodiments, such as Figure 3, Figure 4 , Figure 5 As shown, the pressure relief component 12 includes a pressure relief part 121 and a second sealing part 122 connected to the pressure relief part 121. For easy sealing, the pressure relief part 121 is preferably conical. The valve core 11 has a receiving portion that matches the pressure relief part 121. The second sealing part 122 is cylindrical. Both the interior of the pressure relief part 121 and the interior of the second sealing part 122 are hollow structures. A pressure relief port 1211 is provided on the pressure relief part 121. The pressure relief port 1211 and the pressure relief part... The internal parts of 121 are interconnected. When the pressure relief component 12 is not subjected to external force, and the pressure relief part 121 is in close contact with the receiving part, the pressure relief port 1211 is misaligned with the pressure relief flow channel 1111. At the same time, the second sealing part 122 seals the pressure relief flow channel 1111. In this way, the liquid inside the female connector 1 cannot flow into the pressure relief flow channel 1111 through the pressure relief port 1211, nor can it flow into the pressure relief flow channel 1111 through other places. When the pressure relief component 12 is subjected to external force, such as Figure 6 As shown, when the pressure relief part 121 moves into the receiving part, the pressure relief port 1211 is opposite to the pressure relief flow channel 1111, and the liquid inside the female connector 1 flows into the pressure relief flow channel 1111 through the pressure relief port 1211, thereby reducing the pressure inside the female connector 1.

[0037] In some embodiments, such as Figure 2 , Figure 5 As shown, the outer diameter of the second sealing part 122 near the pressure relief part 121 is equal to the outer diameter of the bottom of the pressure relief part 121, and the outer diameter of the second sealing part 122 away from the pressure relief part 121 is smaller than the outer diameter of the bottom of the pressure relief part 121. The second sealing part 122 away from the pressure relief part 121 is fitted with a second elastic member 124. In this way, when the female connector 1 and the male connector 2 are separated, the second elastic member 124 can provide the pressure relief member 12 with the force to move in the opening direction, so that the pressure relief port 1211 and the pressure relief flow channel 1111 can be quickly misaligned to prevent a large amount of liquid from flowing out of the female connector 1.

[0038] In some embodiments, such as Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, in order to enable the push rod 21 to act on the pressure relief member 12, the pressure relief member 12 includes a force-receiving part 123 connected to the pressure relief part 121. The force-receiving part 123 and the second sealing part 122 are respectively provided on two opposite sides of the pressure relief part 121. The force-receiving part 123 extends out of the opening. During the docking process of the male connector 2 and the female connector 1, the push rod 21 first abuts against the force-receiving part 123, and the pressure relief member 12 moves towards the inside of the valve core 11 under the action of this force.

[0039] In some embodiments, such as Figure 7 , Figure 8 and Figure 9As shown, the pressure relief component 12 includes a pressure relief ball 126 and a third spring 125 disposed inside the receiving cavity. The pressure relief ball 126 is adjacent to the opening, and the maximum cross-sectional area of ​​the pressure relief ball 126 is smaller than the cross-sectional area of ​​the valve core 11. When the pressure relief ball 126 is not subjected to external force, at least part of the pressure relief ball 126 protrudes from the opening, sealing the opening. When the pressure relief ball 126 is subjected to external force, the pressure relief ball 126 separates from the opening, and some liquid inside the female connector 1 flows out, thereby reducing the pressure inside the female connector 1. The third spring 125 is disposed on the side of the pressure relief ball 126 away from the opening. Thus, when the female connector 1 and the male connector 2 are separated, the third spring 125 can provide the pressure relief component 12 with the force to move towards the opening, thereby quickly sealing the opening with the pressure relief ball 126 and preventing a large amount of liquid from flowing out of the female connector 1.

[0040] In some embodiments, such as Figure 2 As shown, for easy sealing, the first sealing part 111 is conical, and the housing has a shape that matches the first sealing part 111. The elastic element mounting part 112 is cylindrical, with the opening located at the top of the cone. The elastic element mounting part 112 is connected to the bottom of the cone, and the outer diameter of the elastic element mounting part 112 is smaller than the outer diameter of the bottom of the cone. The first elastic element 113 is sleeved on the elastic element mounting part. The female connector 1 has a first fixing element 13, which has a hollow structure. The first elastic element 113 is located between the first sealing part 111 and the first fixing element 13. When the female connector 1 and the male connector 2 are separated, the first elastic element 113 can provide the valve core 11 with a force to move in the direction of the female connector 1 outward, so that the valve core 11 can quickly seal the female connector 1, thereby preventing a large amount of liquid from flowing out of the female connector 1.

[0041] In some embodiments, such as Figure 6 , Figure 9 As shown, the male connector 2 is provided with a second fixing member 22, which is a hollow structure. The diameter of the end of the push rod 21 near the female connector 1 is larger than the diameter of the end of the push rod 21 away from the female connector 1. The end of the push rod 21 away from the female connector 1 is provided with a fourth elastic member 23, which is limited between the second fixing member 22 and the push rod 21.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A quick-change coupling for a pipe, characterized in that The utility model provides a kind of valve, comprising Male connector (2), the male connector (2) is equipped with ejector rod (21), the ejector rod (21) can be moved along the length direction of the male connector (2); Female connector (1), the female connector (1) is equipped with valve core (11), the valve core (11) is equipped with pressure relief piece (12), the cross-sectional area of the ejector rod (21) is not less than the cross-sectional area of the pressure relief piece (12), the cross-sectional area of the pressure relief piece (12) is less than the cross-sectional area of the valve core (11), and at least part of the pressure relief piece (12) protrudes from the valve core (11) without external force, the pressure relief piece (12) moves to the inside of the valve core (11) under the action of external force, and the ejector rod (21) is first abutted with the pressure relief piece (12) during the butt joint process of the male connector (2) and the female connector (1), so that the male connector (2) is connected with the female connector (1).

2. A quick change coupling for a pipe according to claim 1, wherein, The valve core (11) includes a first sealing portion (111), a first elastic member (113), and an elastic member mounting portion (112) connected to the first sealing portion (111), the first sealing portion (111) and the elastic member mounting portion (112) form a containing cavity, the pressure relief piece (12) is arranged in the containing cavity, the first sealing portion (111) is provided with an opening communicating with the containing cavity, and the pressure relief piece (12) at least partially extends out of the opening, and the pressure relief piece (12) can move to the inside of the containing cavity under the action of the ejector rod (21).

3. A quick change coupling for a pipe according to claim 2, wherein, The first sealing portion (111) is provided with a pressure relief flow channel (1111), and the pressure relief piece (12) is provided with a pressure relief port (1211), the pressure relief flow channel (1111) can communicate with the pressure relief port (1211) under the action of external force.

4. A quick change coupling for a pipe according to claim 3, wherein, The pressure relief piece (12) includes a pressure relief portion (121) and a second sealing portion (122) connected to the pressure relief portion (121), the pressure relief portion (121) is conical, the second sealing portion (122) is cylindrical, the inside of the pressure relief portion (121) and the inside of the second sealing portion (122) are both hollow structures, the pressure relief port (1211) is arranged on the pressure relief portion (121), and the pressure relief port (1211) communicates with the inside of the pressure relief portion (121).

5. A quick change coupling for a pipe according to claim 4, wherein, The outer diameter of the second sealing portion (122) adjacent to one end of the pressure relief portion (121) is equal to the outer diameter of the bottom of the pressure relief portion (121), the outer diameter of the second sealing portion (122) away from one end of the pressure relief portion (121) is less than the outer diameter of the bottom of the pressure relief portion (121), and a second elastic member (124) is sleeved on the end of the second sealing portion (122) away from the pressure relief portion (121).

6. A quick change coupling for a pipe according to claim 4, wherein, The pressure relief piece (12) comprises a force receiving part (123) connected with the pressure relief part (121), the force receiving part (123) and the second sealing part (122) are respectively arranged on two sides opposite to the pressure relief part (121), the force receiving part (123) extends out of the opening, and the ejector rod (21) first abuts against the force receiving part (123) during the butt joint of the male connector (2) and the female connector (1).

7. A quick change coupling for pipe as defined in claim 2, wherein, The pressure relief piece (12) comprises a pressure relief ball (126) and a third spring (125) arranged inside the accommodating cavity, the pressure relief ball (126) is adjacent to the opening, and at least part of the pressure relief ball (126) protrudes out of the opening under no external force, and the third spring (125) is arranged on the side of the pressure relief ball (126) away from the opening.

8. A quick change coupling for pipes according to any one of claims 2-7, characterized in that, The first sealing part (111) is conical, the elastic piece mounting part (112) is cylindrical, the opening is arranged at the top of the cone, the elastic piece mounting part (112) is connected with the bottom of the cone, the outer diameter of the elastic piece mounting part (112) is smaller than the outer diameter of the bottom of the cone, and the first elastic piece (113) is sleeved on the elastic piece mounting part.

9. A quick change coupling for pipe as defined in claim 1, wherein, The male connector (2) is provided with a second fixing piece (22), one end of the ejector rod (21) adjacent to the female connector (1) has a diameter larger than that of the other end of the ejector rod (21) away from the female connector (1), the other end of the ejector rod (21) away from the female connector (1) is provided with a fourth elastic piece (23), and the fourth elastic piece (23) is limited between the second fixing piece (22) and the ejector rod (21).

Images